Update Thumper location

Author: John Kelly

README.md

@@ -4,7 +4,7 @@
 
 The RabbitMqBundle incorporates messaging in your application via [RabbitMQ](http://www.rabbitmq.com/) using the [php-amqplib](http://github.com/php-amqplib/php-amqplib) library.
 
-The bundle implements several messaging patterns as seen on the [Thumper](https://github.com/videlalvaro/Thumper) library. Therefore publishing messages to RabbitMQ from a Symfony2 controller is as easy as:
+The bundle implements several messaging patterns as seen on the [Thumper](https://github.com/php-amqplib/Thumper) library. Therefore publishing messages to RabbitMQ from a Symfony2 controller is as easy as:
 
 ```php
 $msg = array('user_id' => 1235, 'image_path' => '/path/to/new/pic.png');